I‘m using multiple PDF documents in one notebook with each document having around 30 pages. So let’s say with 5 PDFs I‘d have 150 pages. Sometimes I‘d like to move PDF document B in front of document A. For now I have to rearrange (move) all 30 pages one by one. Many times I mess up the order of the pages, because it‘s just hard to see the content, yet alone the page number, in thumbnail view. Grouping all 30 pages from that PDF document would make them stay together - in the correct order - and I could move the PDF as a whole with one swipe.